Add blindfold mode
On lichess, players can enable blindfold mode, which hides all the pieces on the board. I think it would be nice to have this on lishogi as well. I apologize if this feature is already available and I missed it.
The blindfold mode is already implemented as shown in the image below. You can find the option at the very bottom of Settings ⇒ Game Display. Could you please check it once and report it as a bug if it's not working?
After some experimentation, I discovered that the reason I couldn't find this setting is because I was not signed in to an account. The accessibility of this feature differs from Lichess where this setting is available to everyone, whether signed in or not. Perhaps this setting could be moved to the settings menu brought up by the gear icon in the top-right of the screen, right next to Zen mode
What about adding invisible pieces as a separate 'piece set'? I would also add blank pieces (just stones no symbols on them).